Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 900 - 80 + 900 = _______
- 795 = 500 + _______ + 20
- 8863 = 8000 + _______ + 3
- 3659 = 3050 + _______
(a)
900 - 80 + 900
= 900 + 900 - 80
= 1800 - 80
= 1720
(b)
795 = 500 + ______ + 20
795 = 500 + 20 + ______
795 = 520 + ______
795 - 520 = 275
(c)
8863 = 8000 + ______ + 3
8863 = 8000 + 3 + ______
8863 = 8003 + ______
8863 - 8003 = 860
(d)
3659 = 3050 + ______
3659 - 3050 = 609
Answer(s): 1720, 275, 860, 609